Carbon encapsulated mixed-metal sulfide as proficient electrocatalyst for hydrogen evolution reaction
Carbon encapsulated mixed-metal sulfide as proficient electrocatalyst for hydrogen evolution reaction
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碳封装的混合金属硫化物作为析氢反应的高效电催化剂
DOI：
10.1007/s10854-019-01848-2
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发表时间：
2019
影响因子：
2.8
通讯作者：
Qiao Guanjun
中科院分区：
文献类型：
--
作者：
Hussain Shahid;Ullah Nabi;Zhang Yingyi;Aslam Nimra;Shaheen Asma;Javed Muhammad Sufyan;Wang Mingsong;Liu Guiwu;Qiao Guanjun
通过一步、简单和低温热解方法合成了用于析氢反应（HER）的高效电催化剂。混合金属硫化物催化剂Co 9 S8/NiS@C显示出具有被碳层覆盖的小孔的不规则多形结构。所制备的Co 9 S8/NiS@C复合材料由非常小的混合纳米颗粒组成。微小的纳米颗粒含有大的表面积，作为一个活性位点，具有优异的HER性能。Co 9 S8/NiS@C电极在碱性溶液下测试，在10 mA cm−2的电流密度下表现出0.28 V的过电位（相对于RHE）。它具有较低的Rct和良好的10 h连续稳定性。Co 9 S8/NiS@C优异的HER性能归因于混合金属硫化物的形状、尺寸和晶体结构以及为电催化反应提供丰富活性位点的小的表面孔。
Proficient electrocatalyst for hydrogen evolution reaction (HER) synthesized via a single-step, simple and low-temperature pyrolysis method. The mixed metal sulfide catalyst Co9S8/NiS@C shows irregular multi-shaped structure having small pores covered with carbon layers. The as-prepared Co9S8/NiS@C composites are made up of very small intermingled nanoparticles. The tiny nanoparticle contains large surface area that serves as an active-site for excellent HER performances. The Co9S8/NiS@C electrode is tested under alkaline solution performs overpotential (vs. RHE) of 0.28 V at current density of 10 mA cm−2. It exhibits a low Rctwith an excellent and continuous stability for 10 h. The excellent HER performances of Co9S8/NiS@C are attributed to shape, size, and crystal structure of mixed metal sulfide and small surface pores that provide abundant active sites for electrocatalysis reaction.