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“The major PGM metals, mainly platinum, rhodium and palladium, are key components in the catalytic convertors that vehicle manufacturers use to reduce or neutralise harmful pollutants from exhaust emissions,” explains Nkateko Mathonsi, Resources Analyst and Deputy Head of Research at Investec Corporate and Institutional Banking.
More stringent regulatory requirements to achieve climate change risk mitigation may eventually consign the internal combustion engine to the scrapheap of history.
READ MORE: EVs, hybrids, and the phasing out of diesel: a collapsing timeline
Metals will play a crucial role in green energy transition
According to the International Renewable Energy Agency (IRENA), this transition will transform the global energy sector from fossil fuels to zero-carbon energy by the second half of this century and hydrogen will play a central role within the world's new energy mix.
Mathonsi explains that the world has experienced a new wave of interest in the hydrogen economy as its potential applications continued to grow. “Hydrogen is an extremely abundant element, and we can produce it with a marginal carbon footprint, if harnessed properly.”
According to the Hydrogen Council, 18 countries already have roadmaps or strategy documents setting out their intentions to use hydrogen as a source of alternative energy in the future.
Hydrogen is an extremely abundant element, and we can produce it with a marginal carbon footprint, if harnessed properly.
Nkateko Mathonsi, Resources Analyst and Deputy Head of Research at Investec Corporate and Institutional Banking
Platinum to take a leading role in hydrogen production
And platinum will assume a particularly important role in the production of hydrogen as a clean energy source. It is the catalyst material used in the proton exchange membrane (PEM) electrolysis process to produce green hydrogen if the electricity input is harnessed from green renewable energy sources.
“The acidic nature of the PEM electrolyte has thus far limited the choice of suitable catalysts to PGMs. Platinum is presently the benchmark catalyst for hydrogen evolution on PEM cathodes with the best activity efficiencies and excellent stability. Iridium and ruthenium are the most active materials on the anode but it appears ruthenium suffers from deactivation,” explains Mathonsi.
Making the platinum group metals sector part of a sustainable future
Hydrogen has the potential to be a game changer for PGMs
As such, the potential for hydrogen to decarbonise not only the transport sector but a broader proportion of the energy sector, is extremely promising and may be a game changer for sustained demand for PGMs, suggests Mathonsi.
“Growing support from a broader spectrum of industries and governments for using hydrogen as a mainstream sustainable energy source, and the use of fuel cells beyond the transport sector could massively bolster the PGM demand over the long term,” she says.
About the author
Patrick writes and edits content for Investec Wealth & Investment, and Corporate and Institutional Banking, including editing the Daily View, Monthly View and One Magazine - an online publication for Investec's Wealth clients. Patrick was a financial journalist for many years for publications such as Financial Mail, Finweek and Business Report. He holds a BA and a PDM (Bus.Admin.) both from Wits University.