Gong Yuzhu, Lv Feng, Lu Yidong, Yu YanLin, Niu JingLin, Lang Jianping, Deng Yaoyao, Cao Xueqin, Gu Hongwei
College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Suzhou Nano Science and Technology, Collaborative Innovation Center for New-type Urbanization and Social Governance of Jiangsu Province, Soochow University, Suzhou 215123, P. R. China.
Nanoscale. 2020 Mar 21;12(11):6472-6479. doi: 10.1039/c9nr10331g. Epub 2020 Mar 10.
Metallic sulfides have emerged as highly active, durable, and robust electrocatalysts for the electrocatalytic hydrogen evolution reaction (HER) due to their intriguing electronic and catalytic properties. One of the important strategies to further enhance their HER performance is to build multimetallic nanostructures by tuning the electronic state. Here we combine multimetallic structures and metal sulfides, and report an efficient strategy for the in situ surface-derivation of molybdenum sulfide nanosheets (MoS NSs) on Ag-Pd-Mo alloy nanowires (AgPdMo NWs) to form AgPdMo/MoS NWs. The heterostructure incorporates AgPdMo NWs with high conductivity and MoS NSs with abundant active sites, which act synergistically in alkaline solution. The as-tuned AgPdMo/MoS NWs exhibit Pt-like electrocatalytic performance for the HER, with a small overpotential of 54 mV at a current density of 10 mA cm and a low Tafel slope of 72 mV dec. The present work demonstrates a potential strategy for designing heterostructures with multimetallic composition by in situ surface-derivation with enhanced performance in water splitting.
金属硫化物因其引人入胜的电子和催化特性，已成为用于电催化析氢反应（HER）的高活性、耐用且稳健的电催化剂。进一步提高其HER性能的重要策略之一是通过调节电子态来构建多金属纳米结构。在此，我们将多金属结构与金属硫化物相结合，并报告了一种在Ag-Pd-Mo合金纳米线（AgPdMo NWs）上原位表面衍生硫化钼纳米片（MoS NSs）以形成AgPdMo/MoS NWs的有效策略。这种异质结构将具有高导电性的AgPdMo NWs与具有丰富活性位点的MoS NSs结合在一起，它们在碱性溶液中协同作用。经过调整的AgPdMo/MoS NWs对HER表现出类似铂的电催化性能，在电流密度为10 mA cm时过电位小至54 mV，塔菲尔斜率低至72 mV dec。本工作展示了一种通过原位表面衍生设计具有多金属组成的异质结构以增强水分解性能的潜在策略。
