Researchers have shown that plasmonic black gold-nickel efficiently catalyzes CO2 hydrogenation using visible light.
Researchers at Tata Institute of Fundamental Research , Mumbai, have demonstrated that plasmonic black gold-nickel efficiently catalyzes CO2 hydrogenation using visible light.
They found a multifold increase in the catalytic activity as compared to the catalyst DPC-C4 to the extent that measurable photoactivity was only observed with the catalyst DPC-C4-Ni. Their work showed the best-reported CO production rate of 2464± 40 mmol gNi-1 h-1 and selectivity greater than 95% in the flow conditions. The catalyst also showed extraordinary stability .
Ultrafast studies of hot-carrier dynamics proved the superfast electron injection from Au to Ni, populating the Ni reactor with charge carriers. The researchers observed a spectral signature of such an indirect charge generation due to hot electron transfer from the gold to the nickel. Finite-difference time-domain simulations also showed plasmon-induced high local field intensity enhancement in DPC-C4-Ni.
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