Magnesium-regulated oxygen vacancies of nickel layered double hydroxides for electrocatalytic water oxidation
Magnesium-regulated oxygen vacancies of nickel layered double hydroxides for electrocatalytic water oxidation
复制标题
镍层状双氢氧化物的镁调节氧空位用于电催化水氧化
DOI：
10.1039/c8ta04615h
复制
发表时间：
2018-10
影响因子：
11.9
通讯作者：
Duan Chunying
中科院分区：
文献类型：
--
作者：
Chen Liyong;Zhang Yingyue;Li Dezhi;Wang Yanxin;Duan Chunying
在电催化剂中产生掺杂诱导缺陷是实现高效电催化析氧反应的有效策略。本文采用2-甲基咪唑辅助溶剂热法合成了Mg掺杂的Ni层状双金属氢氧化物（NiMg-LDHs）。在合成过程中，镁诱导的NiMg-LDH主体层中氧空位的产生是电解过程中电子转移和OH−阴离子吸附改善的原因。因此，NiMg-LDHs表现出增强的电催化OER性能，在10 mA cm-2的电流密度下具有低过电位（η10：254 mV），在321 mV的过电位下具有高质量活性（56.3 A g-1）。引入还原氧化石墨烯（rGO）后，NiMg-LDHs/GO杂化复合材料的电催化活性进一步提高，η10降低到232 mV。这一发现突出了s区金属在调节OER的电催化活性方面的前景，这有助于扩展能源相关领域中的上级电催化剂的范围。
Generation of doping induced defects in electrocatalysts is becoming an effective strategy for the highly efficient electrocatalytic oxygen evolution reaction (OER). Herein, Mg doped Ni layered double hydroxides (NiMg-LDHs) were prepared by a novel 2-methylimidazole-assisted solvothermal route. Mg-induced generation of oxygen vacancies in the NiMg-LDH host layers during the synthetic process is accountable for the improvement of electron transfer and OH− anion adsorption during electrolysis. Thus NiMg-LDHs exhibit an enhanced performance for the electrocatalytic OER with a low overpotential (η10: 254 mV) at a current density of 10 mA cm−2 and high mass activity (56.3 A g−1) at an overpotential of 321 mV. The electrocatalytic activity was further improved after introducing reduced graphene oxide (rGO) to form hybrid composites of NiMg-LDHs/Go with decreasing of η10 to 232 mV. This finding highlights the promise of s-block metals in regulating electrocatalytic activity for the OER, which is helpful for extending the scope of superior electrocatalysts in energy-related fields.
登录
查看更多内容
影响因子：
4.5
作者：
Hai-Yan Su;Keju Sun
通讯作者：
Hai-Yan Su;Keju Sun
金属有机骨架基CoP/还原氧化石墨烯：用于整体水分解的高性能双功能电催化剂
影响因子：
8.4
作者：
Jiao L;Zhou YX;Jiang HL
通讯作者：
Jiang HL
影响因子：
15
作者：
Burke, Michaela S.;Kast, Matthew G.;Boettcher, Shannon W.
通讯作者：
Boettcher, Shannon W.
富含缺氧的超薄尖晶石结构纳米片，用于增强电催化水氧化
影响因子：
16.6
作者：
Bao, Jian;Zhang, Xiaodong;Xie, Yi
通讯作者：
Xie, Yi
影响因子：
15
作者：
Petrie, Jonathan R.;Jeen, Hyoungjeen;Lee, Ho Nyung
通讯作者：
Lee, Ho Nyung