Urchin-Like Cobalt-Copper (Hydr)oxides as an Efficient Water Oxidation Electrocatalyst

Ye, QilunDalian Univ Technol, State Key Lab Fine Chem, DUT KTH Joint Educ & Res Ctr MoleCoCular Devices, Dalian 116024, Peoples R China. (författare)

QC 20200720
The development of e & xfb03;cient and low-cost oxygen evolution reaction (OER) catalysts is essential for the generation of clean hydrogen energy from water splitting. Herein, a novel hierarchical urchin-like cobalt-copper (hydr)oxide in situ grown on copper foam (CoCuOxHy(S)/CF) was synthesized through the electrochemical transformation of cobalt-copper sulfides (Co9S8-Cu1.81S) via anodization process. This CoCuOxHy(S)/CF anode exhibited a low overpotential (eta) of 274 mV at a current density of 100 mA cm(-2)with a robust durability over a period of 40 h when operated at 10 mA cm(-2). Further investigations imply that the unique nanowires aggregated urchin-like structure of CoCuOxHy(S) derived from the in situ anion exchange process could facilitate the exposure of active sites and accelerate electron transfer. More importantly, the incorporation of copper resulted in an electronic delocalization around the cobalt species, which contributed to reach a high-valent catalytically active cobalt species and further improved the OER performance.

Hou, XiyanDalian Minzu Univ, Coll Life Sci, Key Lab Biotechnol & Bioresources Utilizat, Minist Educ, Dalian 116600, Peoples R China. (författare)
Lee, HusilengDalian Univ Technol, State Key Lab Fine Chem, DUT KTH Joint Educ & Res Ctr MoleCoCular Devices, Dalian 116024, Peoples R China. (författare)
Liu, HongzhenDalian Univ Technol, State Key Lab Fine Chem, DUT KTH Joint Educ & Res Ctr MoleCoCular Devices, Dalian 116024, Peoples R China. (författare)
Lu, LiangjieDalian Univ Technol, State Key Lab Fine Chem, DUT KTH Joint Educ & Res Ctr MoleCoCular Devices, Dalian 116024, Peoples R China. (författare)
Wu, XiujuanDalian Univ Technol, State Key Lab Fine Chem, DUT KTH Joint Educ & Res Ctr MoleCoCular Devices, Dalian 116024, Peoples R China. (författare)
Sun, Licheng,1962-KTH,Organisk kemi,Dalian Univ Technol, State Key Lab Fine Chem, DUT KTH Joint Educ & Res Ctr MoleCoCular Devices, Dalian 116024, Peoples R China.;Dalian Univ Technol, Inst Energy Sci & Technol, Dalian 116024, Peoples R China.(Swepub:kth)u1umfd9h (författare)
Dalian Univ Technol, State Key Lab Fine Chem, DUT KTH Joint Educ & Res Ctr MoleCoCular Devices, Dalian 116024, Peoples R China.Dalian Minzu Univ, Coll Life Sci, Key Lab Biotechnol & Bioresources Utilizat, Minist Educ, Dalian 116600, Peoples R China. (creator_code:org_t)

Av författaren/redakt...: Ye, Qilun; Hou, Xiyan; Lee, Husileng; Liu, Hongzhen; Lu, Liangjie; Wu, Xiujuan; visa fler...; Sun, Licheng, 19 ...; visa färre...

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