Precise tuning in platinum-nickel/nickel sulfide interface nanowires for synergistic hydrogen evolution catalysis

By Pengtang Wang, Xu Zhang, Jin Zhang, Sheng Wan, Shaojun Guo, G. Lu, Jianlin Yao, Xiaoqing Huang. Nature Communications, 2017

720 citations recorded by the source corpus.

Comprising abundant interfaces, multicomponent heterostructures can integrate distinct building blocks into single entities and yield exceptional functionalities enabled by the synergistic components. Here we report an efficient approach to construct one-dimensional metal/sulfide heterostructures by directly sulfuring highly composition-segregated platinum-nickel nanowires. The heterostructures possess a high density of interfaces between platinum-nickel and nickel sulfide components, which cooperate synergistically towards alkaline hydrogen evolution reaction. The platinum-nickel/nickel sulfide heterostructures can deliver a current density of 37.2 mA cm−2 at an overpotential of 70 mV, which is 9.7 times higher than that of commercial Pt/C. The heterostructures also offer enhanced stability revealed by long-term chronopotentiometry measurements. The present work highlights a potentially powerful interface-engineering strategy for designing multicomponent heterostructures with advanced performance in hydrogen evolution reaction and beyond. Multicomponent, nanoscale heterostructures may exhibit notable catalytic properties imparted by the various building blocks. Here, the authors fabricate metal/sulfide heterostructures via direct sulfurization of segregated platinum-nickel nanowires, and assess their hydrogen evolution performance.

Subfields: Electrical and Electronic Engineering, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/312974f402db5d9894bd40376ea7f36a62f542b3

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Citations in the corpus

• H2 In Situ Inducing Strategy on Pt Surface Segregation Over Low Pt Doped PtNi5 Nanoalloy with Superhigh Alkaline HER Activity (2020, background): “(ΔGH2O) and Had (ΔGH), being of two types of key activity indicators for Volmer and Tafel 284 steps, respectively.(34) Obviously, the PtNi5-n samples exhibit much lower absolute values of 285”