Cuprous Oxide Electrodeposited with Nickel for the Oxygen Evolution Reaction in 1 M NaOH
Cuprous Oxide Electrodeposited with Nickel for the Oxygen Evolution Reaction in 1 M NaOH
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DOI：
10.1021/acs.jpcc.8b10413
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发表时间：
2019-01-17
影响因子：
3.7
通讯作者：
Barile, Christopher J.
中科院分区：
文献类型：
--
作者：
Lee, Yi Teng;Gautam, Rajendra P.;Barile, Christopher J.
水的电解受到析氧反应（OER）的高过电位的限制。在寻找一种廉价和有效的催化剂OER，我们构建电催化剂使用氧化亚铜（CuO）薄膜改性与Ni覆盖层。通过调整电沉积在Cu 2 O上的Ni的量，我们确定了在碱性溶液中用于OER的Ni/Cu 2 O的最佳比率，其中最佳催化剂具有仅150 mV的起始过电位。使用XRD、SEM、EDS和AFM的表面表征表明，催化剂的组成和形态高度依赖于电沉积的Ni的量，并且这些差异决定催化剂性能。特别是，最佳的催化剂包含一个相当均匀的分布的Ni和Cu 2 O颗粒，这表明，催化剂的网站促进有效的O-2的演变。
The electrolysis of water is limited by the high overpotential of the oxygen evolution reaction (OER). In search of an inexpensive and efficient catalyst for OER, we construct electrocatalysts using cuprous oxide (Cu2O) thin films modified with a Ni overlayer. By tuning the amount of Ni electrodeposited on top of the Cu2O, we determine the optimal ratio of Ni/Cu2O for OER in alkaline solution with the best catalyst possessing an onset overpotential of only 150 mV. Surface characterization using XRD, SEM, EDS, and AFM indicates that the composition and morphology of the catalyst is highly dependent upon the amount of Ni electrodeposited, and these differences determine catalyst performance. In particular, the optimal catalyst contains a fairly uniform distribution of Ni and Cu2O particles, suggesting that bimetallic sites facilitate efficient O-2 evolution.