Tag: platinum group metals

  • Platinum Group Metals: The Catalysts That Power Every Car and Could Power the Hydrogen Economy

    Six elements — platinum, palladium, rhodium, iridium, ruthenium, and osmium — sit together on the periodic table, occur together in the same ore bodies, are mined together, refined together, and share a set of physical properties that make them collectively irreplaceable in modern industrial chemistry: they catalyze reactions at extreme temperatures without degrading, resist corrosion under conditions that destroy other metals, and can be recycled to 99.95% purity indefinitely. They are the platinum group metals — PGMs — and their defining characteristic in the context of this course is that roughly 80% of global platinum, 40% of palladium, and over 80% of rhodium and iridium come from a geological formation in South Africa called the Bushveld Complex, a two-billion-year-old igneous intrusion covering 66,000 square kilometers — an area the size of Sri Lanka — that contains the largest PGM reserves on Earth. Russia’s Norilsk Nickel is the other major producer, accounting for approximately 40% of global palladium and 10% of platinum. Together, South Africa and Russia supply the overwhelming majority of PGMs consumed by the global automotive, chemical, petroleum refining, and emerging hydrogen industries. The supply chain concentration pattern is familiar from every other lecture in this course. What makes PGMs different is that the concentration isn’t in China — it’s in a country with rolling electrical blackouts and a country under Western sanctions for invading Ukraine.

    What they’re inside

    The single largest demand sector for PGMs is the catalytic converter — the device bolted into the exhaust system of essentially every internal combustion engine vehicle sold since the 1970s. Platinum, palladium, and rhodium catalyze the conversion of carbon monoxide, unburned hydrocarbons, and nitrogen oxides into carbon dioxide, water, and nitrogen gas. A typical catalytic converter contains 3 to 7 grams of PGMs. Over 55% of total global PGM demand comes from automotive catalyst applications. Palladium dominates gasoline catalysts. Platinum dominates diesel catalysts. Rhodium is required in both and is the most valuable of the three — a single troy ounce of rhodium traded above $29,000 in 2021 before collapsing to roughly $5,000 by 2024 as automotive production normalized.

    The second-largest demand sector is industrial catalysis — petroleum refining, chemical manufacturing, glass production, and electronics. Platinum and palladium catalyze cracking, reforming, and hydrogenation reactions in oil refineries. Ruthenium shows up in hard disk drive platters. Iridium appears in spark plugs, crucibles for growing single-crystal sapphire for LED substrates, and — increasingly — in the catalysts for proton exchange membrane water electrolyzers that produce green hydrogen.

    The third sector is jewelry — roughly 29% of demand — where platinum’s density, luster, and hypoallergenic properties make it the prestige metal for rings and watches, particularly in China and Japan.

    The fourth, and the one that will determine PGM demand in 2035 and beyond, is the hydrogen economy. Proton exchange membrane fuel cells — the type used in fuel cell electric vehicles from Toyota, Hyundai, and others — use platinum catalysts at both the anode and cathode. A typical fuel cell vehicle contains 50 to 80 grams of platinum, roughly 10 to 25 times more PGM than a catalytic converter. The target is to reduce PGM loading to 10-20 grams per vehicle, which would still be 2-8 times more than a catalytic converter. PEM electrolyzers — the machines that split water into hydrogen and oxygen using electricity — require both platinum and iridium catalysts. If the hydrogen economy develops as its proponents expect, PGM demand from fuel cells and electrolyzers could offset or exceed the decline from catalytic converters as internal combustion engines are phased out. That is a very large “if,” and the fusion companies and the vanadium flow battery developers are betting on alternative pathways for grid power and storage that would reduce the urgency of the hydrogen transition.

    The supply problem

    Platinum mine supply hit its lowest level in five years in 2025 — 5.51 million ounces — and the market recorded a 692,000-ounce deficit, the third consecutive annual shortfall according to the World Platinum Investment Council. Above-ground inventories have fallen to less than five months of demand coverage. Bank of America raised its 2026 platinum price forecast to approximately $2,450 per ounce.

    The deficit is structural rather than cyclical, and the structure has three components. The first is geological decline. South Africa‘s Bushveld Complex mines — operated by Anglo American Platinum (now demerged as Valterra Platinum), Impala Platinum, Sibanye-Stillwater, and Northam Platinum — are among the deepest mines in the world, operating at depths of 1 to 2 kilometers underground. Ore grades are declining. Energy costs are rising. South Africa’s electricity grid, operated by the crisis-plagued Eskom, has subjected the mining sector to years of rolling blackouts (load-shedding) that shut down ventilation, hoisting, and processing operations unpredictably. Mining PGMs in South Africa in the 2020s requires extracting lower-grade ore from deeper underground in a country that cannot reliably keep the lights on. The ARMSCOR post documents a South Africa that could build nuclear weapons in secret; the South Africa that mines PGMs today cannot maintain its electrical grid.

    The second is Russian uncertainty. Russia’s Norilsk Nickel produces palladium primarily as a by-product of nickel and copper mining. Western sanctions following the 2022 invasion of Ukraine have not directly targeted PGM exports — the automotive and chemical industries lobbied against it, and Europe’s dependence on Russian palladium was too acute to sever cleanly. But the sanctions environment creates persistent uncertainty: insurance, shipping, and banking complications make Russian PGM supply less reliable even when it’s technically legal to purchase. The antimony and gallium/germanium experiences demonstrate what happens when a concentrated supplier decides to restrict exports. Russia hasn’t restricted PGM exports. The sanctions regime makes continued supply a political decision rather than a commercial certainty.

    The third is iridium scarcity. Iridium is the rarest of the PGMs, produced at approximately 7-8 tonnes per year — exclusively as a by-product of platinum mining, with 80-95% of production in South Africa. There is no primary iridium mine. There is no way to produce more iridium without producing more platinum from the Bushveld Complex. If PEM electrolyzer deployment scales to meet green hydrogen production targets, iridium demand could exceed supply within a decade. The element is so rare and so concentrated that it may represent the single tightest bottleneck in the entire hydrogen economy — tighter than the lithium bottleneck, tighter than the copper bottleneck, because at least lithium and copper have multiple producing countries and expansion-stage projects. Iridium has South Africa and essentially nothing else.

    The recycling success story

    PGM recycling is the one area where the critical minerals recycling story is actually working. Between 21% and 34% of global PGM demand is now satisfied by secondary supply — metals recovered from spent catalytic converters, electronic waste, and industrial process catalysts. Players including Umicore, Johnson Matthey, DOWA, and Tanaka Precious Metals achieve recovery purities above 99.95% using high-temperature smelting, hydrometallurgy, solvent extraction, and selective precipitation. Spent automotive catalysts are expected to provide 71% of all recycled PGMs in 2026, up from 50% in 2010. PGM recycling uses approximately 10 times less energy than primary mining per troy ounce recovered.

    The recycling infrastructure works because PGMs are valuable enough to justify the collection and processing costs — a single catalytic converter contains $100-$500 worth of PGMs at current prices, creating a robust scrap market and, inevitably, a catalytic converter theft epidemic that costs vehicle owners roughly $1 billion per year in the United States alone. The economic incentive that makes recycling viable also makes theft viable. That’s a supply chain operating as designed, if you define “designed” generously.

    The longer-term recycling story depends on what replaces catalytic converters. If the automotive fleet transitions to battery EVs, the wave of catalytic converter scrap will peak in the 2030s as the installed fleet of ICE vehicles ages out, and then decline. If fuel cell vehicles gain market share, their higher PGM loading per vehicle will generate a new recycling stream — but with a 12-to-15-year lag between vehicle sale and vehicle scrapping. The graphite and lithium recycling infrastructures are being built to handle the battery waste stream that will follow the EV transition. The PGM recycling infrastructure is already built. The question is whether it will have enough feedstock.

    Why it’s Lecture 36

    Platinum group metals are the final lecture of the Rare Earth Elements course because they are the capstone case study: a class of metals that is genuinely irreplaceable in current applications, produced from a geological formation that exists essentially nowhere else on Earth, in a country whose infrastructure is deteriorating, alongside a co-producer under international sanctions. The substitution research has been ongoing for 50 years. No viable alternative has emerged for high-temperature catalysis. The hydrogen economy — the clean energy pathway that is supposed to complement batteries and grid-scale storage — depends on platinum and iridium catalysts whose supply is controlled by the same concentrated source. The recycling infrastructure works but is dependent on a fleet of internal combustion engine vehicles that the energy transition is designed to eliminate.

    Every tension the course has taught — geological concentration, processing concentration, substitution difficulty, geopolitical risk, the timescale mismatch between supply and demand, the gap between legislation and operational capacity — converges on PGMs. The semiconductor supply chain has TSMC in Taiwan. Lithium has Chinese refining. Antimony has Chinese mining. PGMs have the Bushveld Complex — 66,000 square kilometers of two-billion-year-old magma, 1-2 kilometers underground, in a country where the electricity doesn’t always work. That’s the supply chain the hydrogen economy is built on. The course ends here because this is where all the threads meet.

    This is the kind of supply chain our Rare Earth Elements course was built to map — where six metals that share an ore body share a chokepoint, the chokepoint is a geological formation the size of a country, and the question that will determine whether the hydrogen economy is viable is whether South Africa can keep its mines running and its electricity on at the same time.

  • Asteroid Mining: Who’s Trying, What They’d Mine, and Why the Economics Don’t Work Yet

    In 2015, astrophysicist Neil deGrasse Tyson predicted that the world’s first trillionaire would be the person who exploits the natural resources on asteroids. In 2023, NASA’s OSIRIS-REx mission returned 122 grams of rock from the asteroid Bennu — about the weight of a deck of playing cards — after a seven-year round trip. Those 122 grams are the total quantity of asteroid material humanity has successfully retrieved from space and brought to Earth. The gap between the promise and the operational reality is the entire story of asteroid mining in 2026: the resources are real, the physics is plausible, the companies exist, and nobody has extracted a single commercially viable gram of anything from any asteroid, ever. Two of the three most prominent companies from the 2010s hype cycle are dead. The current generation is further along, more technically grounded, and still years away from proving the business case.

    What’s actually up there

    The resource thesis is not speculation. Metallic M-type asteroids are more than 90 percent iron by mass and contain concentrated deposits of platinum-group metals — platinum, palladium, rhodium, iridium, ruthenium, and osmium — at densities 1,000 to 10,000 times higher than terrestrial ore bodies. A single metallic asteroid a few hundred meters across could theoretically contain more platinum-group metals than have been mined in all of human history. The concentrations aren’t evenly distributed and haven’t been verified by direct assay on more than a handful of samples, but spectroscopic surveys of near-Earth asteroids and laboratory analysis of metallic meteorites consistently support the thesis.

    The value density is staggering at current spot prices. Rhodium trades at approximately $334,000 per kilogram as of early 2026. Iridium is roughly $215,000 per kilogram. Platinum sits at about $67,000 per kilogram. Palladium is around $55,000 per kilogram. AstroForge — the most visible PGM-focused mining company — estimates that a successful mission returning 1,000 to 2,000 kilograms of refined PGM material would be worth $70 to $140 million. The margins on asteroid-sourced PGMs, the company claims, could reach 85 percent — compared to roughly 7 percent for terrestrial PGM mining. Those are projections built on assumptions that haven’t been tested in a single real extraction, but they explain why venture capital keeps writing checks.

    The second resource thesis — and arguably the more economically near-term one — isn’t precious metals at all. It’s water. Water is worthless on Earth and enormously expensive to launch to orbit. Carbonaceous C-type asteroids contain significant water ice that can be extracted thermally, electrolyzed into hydrogen and oxygen, and used as rocket propellant. The value proposition isn’t selling water on Earth. It’s selling it in space, where every kilogram of propellant you don’t have to launch from the surface saves thousands of dollars in launch costs. This is the thesis that TransAstra and Karman+ are building toward — not Earth-return mining but in-space resource utilization that creates a supply chain for the growing orbital economy.

    Who’s actually trying

    The 2010s generation is gone. Planetary Resources, founded in 2010 with backing from Larry Page, Eric Schmidt, and James Cameron, was acquired by a blockchain company called ConsenSys in 2018 — a sentence that tells you everything you need to know about what happened. Deep Space Industries, founded in 2013, was acquired by Bradford Space in 2019 and pivoted entirely away from mining. Both companies burned through tens of millions of dollars without getting a spacecraft to an asteroid.

    The current generation is leaner, cheaper, and further along — but not yet successful. AstroForge, founded in 2022 in Huntington Beach, California, is the highest-profile PGM-focused company. Its first mission in April 2023 launched a microwave-sized satellite carrying simulated asteroid material and an onboard refinery designed to demonstrate that metal processing could work in microgravity. The solar panels wouldn’t deploy initially, the satellite wobbled, communications were intermittent, and the simulated extraction was never completed. Its second mission, Odin, launched in February 2025 with the goal of flying to asteroid 2022 OB5 and capturing imagery for a future mining mission — the first commercial deep space mission to target an asteroid. AstroForge lost contact with the probe approximately 20 hours after deployment. The company titled its debrief “Odidn’t.” Its third mission, Vestri, is scheduled for 2026 and aims to land on the target asteroid and take measurements for future extraction. AstroForge’s plan is to vaporize asteroid ore and use magnets to separate the metal in space, then return refined PGMs to Earth with a heat shield and parachute — all for less than $10 million per mission.

    TransAstra, founded by Joel Sercel, has the deepest research portfolio and the most NASA institutional backing. The company partnered with NASA in 2019 to build MiniBee, a prototype demonstrating “optical mining” — using concentrated sunlight inside a capture bag to heat and extract water and volatiles from carbonaceous asteroid material. TransAstra’s full architecture, called Apis, envisions harvesting up to 100 metric tons of water from a single near-Earth asteroid and delivering it to lunar orbit, all from a single Falcon 9 launch. The company is pursuing near-term revenue from space tug and debris capture contracts while developing the longer-term mining infrastructure. Sercel himself has cautioned that mining PGMs and returning them to Earth is “not a near-term prospect” — TransAstra is building the enabling infrastructure, not going straight for the ore.

    Karman+, the newest of the three, plans to go directly to an asteroid in 2026 and test excavation equipment. The UK-based Asteroid Mining Corporation is taking a different approach entirely — focusing on terrestrial applications that generate immediate revenue to fund future space operations, explicitly avoiding the venture capital treadmill that killed the 2010s generation.

    Why the economics don’t close yet

    The physics of reaching an asteroid is not the hard part — some near-Earth asteroids are actually energetically closer to reach than the Moon. The hard parts are everything that happens after arrival. Anchoring to a body with negligible gravity. Extracting material in microgravity, vacuum, and temperature extremes ranging from -270°C in shadow to +120°C in direct sunlight. Processing raw material into something refined enough to be worth returning to Earth. Packaging it in a reentry vehicle that can survive atmospheric entry. Recovering it on the surface. Doing all of this robotically, with round-trip communication delays measured in minutes to hours, on a spacecraft that launched for less than $10 million.

    No one has demonstrated any of these steps at commercial scale. OSIRIS-REx proved sample return is possible — at a mission cost of approximately $1 billion for 122 grams. AstroForge’s thesis is that commercially focused hardware, riding on cheap SpaceX launches, can do it for orders of magnitude less. That thesis hasn’t been tested. The company’s first two missions both failed to achieve primary objectives.

    The market problem is equally real. Platinum-group metals are valuable precisely because they’re rare — global annual platinum production is roughly 190 metric tons. Introducing significant asteroid-sourced supply would depress prices, potentially destroying the economics that justified the mission. The rare earth elements market has this same structural vulnerability — the value exists because of scarcity, and the mining operation undermines the scarcity it’s exploiting. AstroForge’s planned 1,000-to-2,000-kilogram returns per mission would represent roughly 0.5 to 1 percent of annual platinum production, which is probably absorbable. But the pitch to investors involves scaling far beyond that, and the price impact of scaling has no historical precedent.

    The water-in-space thesis avoids the price-depression problem because the market doesn’t exist yet — there’s no orbital propellant depot competing for customers. But it requires the orbital economy to develop enough that in-space refueling becomes a real market rather than a theoretical one. SpaceX’s Starship architecture could either create that market (by generating demand for in-orbit propellant transfer) or destroy it (by making Earth-to-orbit launch so cheap that space-sourced water has no cost advantage).

    Where it sits

    Asteroid mining is simultaneously the most over-hyped and most under-appreciated resource play in the Moonshot 2169 landscape. Over-hyped because no company has extracted anything from any asteroid commercially, two out of three 2010s pioneers are dead, and the current leader has failed two of its first two missions. Under-appreciated because the resource concentrations are real, launch costs have dropped 100x since the concept was first proposed, and the three surviving companies are technically more credible than anything that existed a decade ago. The Outer Space Treaty of 1967 doesn’t explicitly prohibit commercial resource extraction — the 2015 U.S. Commercial Space Launch Competitiveness Act explicitly authorized it — but the legal framework for property rights, environmental liability, and international disputes in space mining remains essentially unwritten.

    The constraint isn’t physics. It isn’t law. It isn’t even money. It’s the gap between “we know the resources exist” and “we’ve proven we can get them” — a gap that AstroForge’s Vestri mission in 2026 is designed to narrow. If Vestri successfully lands on an asteroid and takes measurements, it won’t prove asteroid mining works. It will prove that the next mission has a target worth mining. That’s not a commercial breakthrough. It’s the beginning of a beginning. We cover asteroid mining alongside fusion energy, solid-state batteries, space elevators, and 20 other unfinished machines across our Technology Moonshots course — where “done” means boring, measurable, and operable on a random Tuesday, and nothing about asteroid mining is done yet.