Nanostructured Ni-Cu Electrocatalysts for the Oxygen Evolution Reaction.
Nanostructured Ni-Cu Electrocatalysts for the Oxygen Evolution Reaction.
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DOI：
10.1039/d0cy00427h
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发表时间：
2020-08-07
影响因子：
5
通讯作者：
Barile CJ
中科院分区：
文献类型：
--
作者：
Gautam RP;Pan H;Chalyavi F;Tucker MJ;Barile CJ
镍基材料是碱性介质中析氧反应（OER）中很有前途的电催化剂。我们报道了Ni-Cu纳米颗粒（直径20 - 50 nm）和Ni-Cu纳米团簇（小于20个金属原子）的合成和OER电催化。基质辅助激光解吸/电离和电喷雾电离技术的质谱数据分析表明，成功地合成了以谷胱甘肽配体覆盖的Ni-Cu纳米簇。Ni:Cu金属组成为52:48 mol %的Ni-Cu纳米团簇在10 mA cm−2下的OER起始过电位为50 mV，过电位为150 mV，是最有效的非贵金属OER催化剂之一。通过将纳米团簇催化剂附加到用TiO2纳米粒子修饰的电极上，可以延长碳电极上纳米团簇催化剂的耐久性。红外光谱结果表明，在催化过程中，谷胱甘肽配体的聚集动力学发生了变化。综上所述，这些结果有助于解释一类新型纳米结构Ni-Cu OER催化剂的反应性，这些催化剂是更常见的Ni-Fe， Ni-Co和Ni-Mn材料的未开发替代品。镍铜纳米团簇和纳米颗粒形成了一个高活性的析氧反应电催化剂家族。
Ni-based materials are promising electrocatalysts for the oxygen evolution reaction (OER) for water splitting in alkaline media. We report the synthesis and OER electrocatalysis of both Ni-Cu nanoparticles (20–50 nm in diameter) and Ni-Cu nanoclusters (<20 metal atoms). Analysis of mass spectral data from matrix-assisted laser desorption/ionization and electrospray ionization techniques demonstrates that discrete heterobimetallic Ni-Cu nanoclusters capped with glutathione ligands were successfully synthesized. Ni-Cu nanoclusters with a 52:48 mol % Ni:Cu metal composition display an OER onset overpotential of 50 mV and an overpotential of 150 mV at 10 mA cm−2, which makes this catalyst one of the most efficient nonprecious metal OER catalysts. The durability of the nanocluster catalysts on carbon electrodes can be extended by appending them to electrodes modified with TiO2 nanoparticles. Infrared spectroscopy results indicate that the aggregation dynamics of the glutathione ligands change during catalysis. Taken together, these results help explain the reactivity of a novel class of nanostructured Ni-Cu OER catalysts, which are underexplored alternatives to more commonly studied Ni-Fe, Ni-Co, and Ni-Mn materials. Ni-Cu nanoclusters and nanoparticles form a highly active family of electrocatalysts for the oxygen evolution reaction.
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影响因子：
3.7
作者：
Lee, Yi Teng;Gautam, Rajendra P.;Barile, Christopher J.
通讯作者：
Barile, Christopher J.
影响因子：
15
作者：
DeFlores, Lauren P.;Ganim, Ziad;Tokmakoff, Andrei
通讯作者：
Tokmakoff, Andrei
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：
2.9
作者：
Koppaka, V;Axelsen, PH
通讯作者：
Axelsen, PH
影响因子：
4
作者：
Cheng, Yi;He, Shuai;Jiang, San Ping
通讯作者：
Jiang, San Ping