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Description: 〈p〉Publication date: 15 October 2019〈/p〉 〈p〉〈b〉Source:〈/b〉 Applied Surface Science, Volume 491〈/p〉 〈p〉Author(s): Zhenjiang Li, Xiaomei Wang, Xuehua Wang, Yusheng Lin, Alan Meng, Lina Yang, Qingdang Li〈/p〉 〈div xml:lang="en"〉 〈h5〉Abstract〈/h5〉 〈div〉〈p〉Non-noble metal catalysts for photo/electrocatalytic water splitting are quite feasible for solving the problems of growing energy demand and environmental pollution. In this paper, noble-metal free Mn-Cd-S@amorphous-Ni〈sub〉3〈/sub〉S〈sub〉2〈/sub〉 hybrid catalyst (MCS@a-Ni〈sub〉3〈/sub〉S〈sub〉2〈/sub〉) with bifunctionality of photocatalytic hydrogen evolution and electrocatalytic OER is designed and prepared by simple hydrothermal method. The characterization results show that Mn-Cd-S was composed of cubic manganese sulfide and manganese doped cadmium sulfide, and amorphous Ni〈sub〉3〈/sub〉S〈sub〉2〈/sub〉 coating on the surface of Mn-Cd-S. The resultant Mn-Cd-S@amorphpus-Ni〈sub〉3〈/sub〉S〈sub〉2〈/sub〉 catalyst presents good stability and a high photocatalytic H〈sub〉2〈/sub〉 evolution rate of 12,069.27 μmolh〈sup〉−1〈/sup〉 g〈sup〉−1〈/sup〉. Besides, both Mn-Cd-S and Mn-Cd-S@amorphpus-Ni〈sub〉3〈/sub〉S〈sub〉2〈/sub〉 show good OER property with overpotential of 333 mV. Mn-Cd-S@amorphpus-Ni〈sub〉3〈/sub〉S〈sub〉2〈/sub〉 shows more favorable kinetics than that of Mn-Cd-S for OER. Moreover，the mechanism of the enhanced photo/electrocatalytic performance is investigated in detail. This work provides references for developing the catalysts with both photocatalytic and electrocatalytic properties.〈/p〉〈/div〉 〈/div〉 〈div xml:lang="en"〉 〈h5〉Graphical abstract〈/h5〉 〈div〉〈p〉The Mn-Cd-S@amorphous-Ni〈sub〉3〈/sub〉S〈sub〉2〈/sub〉 hybrid catalyst (MCS@a-Ni〈sub〉3〈/sub〉S〈sub〉2〈/sub〉) was composed of cubic MnS, Mn doped CdS, and amorphous Ni〈sub〉3〈/sub〉S〈sub〉2〈/sub〉 coated on the surface of MCS. MCS@a-Ni〈sub〉3〈/sub〉S〈sub〉2〈/sub〉 possesses excellent photocatalytic H〈sub〉2〈/sub〉 evolution rate of 12,069.27 μmolh〈sup〉−1〈/sup〉 g〈sup〉−1〈/sup〉 and good electrocatalytic OER overpotential of 333 mV.〈figure〉〈img src="https://ars.els-cdn.com/content/image/1-s2.0-S0169433219316216-ga1.jpg" width="449" alt="Unlabelled Image" title="Unlabelled Image"〉〈/figure〉〈/p〉〈/div〉 〈/div〉