Guan Yongxin, Feng Yangyang, Wan Jing, Yang Xiaohui, Fang Ling, Gu Xiao, Liu Ruirui, Huang Zhengyong, Li Jian, Luo Jun, Li Changming, Wang Yu
State Key Laboratory of Power Transmission Equipment and System Security, Chongqing University, 174 Shazheng Street, Shapingba District, Chongqing City, 400044, P. R. China.
Department of Applied Physics, Chongqing University, 55 Daxuecheng South Road, Shapingba District, Chongqing City, 401331, P. R. China.
Small. 2018 Jul;14(27):e1800697. doi: 10.1002/smll.201800697. Epub 2018 May 27.
Herein, a unique ganoderma-like MoS /NiS hetero-nanostructure with isolated Pt atoms anchored is reported. This novel ganoderma-like heterostructure can not only efficiently disperse and confine the few-layer MoS nanosheets to fully expose the edge sites of MoS , and provide more opportunity to capture the Pt atoms, but also tune the electronic structure to modify the catalytic activity. Because of the favorable dispersibility and exposed large specific surface area, single Pt atoms can be easily anchored on MoS nanosheets with ultrahigh loading of 1.8 at% (the highest is 1.3 at% to date). Owing to the ganoderma-like structure and platinum atoms doping, this catalyst shows Pt-like catalytic activity for the hydrogen evolution reaction with an ultralow overpotential of 34 mV and excellent durability of only 2% increase in overpotential for 72 h under the constant current density of 10 mA cm .
在此，报道了一种独特的灵芝状MoS₂ /NiS异质纳米结构，其中锚定有孤立的Pt原子。这种新型灵芝状异质结构不仅可以有效地分散和限制几层MoS₂纳米片，以充分暴露MoS₂的边缘位点，并提供更多捕获Pt原子的机会，还可以调节电子结构以改变催化活性。由于良好的分散性和暴露的大比表面积，单个Pt原子可以很容易地以1.8 at%的超高负载量锚定在MoS₂纳米片上（迄今为止最高为1.3 at%）。由于灵芝状结构和铂原子掺杂，这种催化剂对析氢反应表现出类Pt催化活性，在10 mA cm⁻²的恒电流密度下，过电位仅为34 mV，超耐久性极佳，在72 h内过电位仅增加2%。
