Energy regulators last month said the Grassy Mountain project, proposed by a unit of Australian billionaire Gina Rinehart's Hancock Prospecting, would not be in the public interest.
Researchers have produced luminescent manganese complexes for more sustainable materials and catalysts for converting sunlight into other forms of energy.
In the short term, emissions are on a rising trend, notwithstanding a temporary decline during the covid-19 pandemic, putting the world a long way off track to reach zero emissions by 2050.
The project will help cut carbon emissions by 12% compared with 2020 levels at its Mt. Keith and Leinster nickel operations, where power is currently being generated through diesel and gas turbines.