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A non-precious hydrogen catalyst coated metallic electrode in an electrochemical neutralization cell for simultaneous fuel and power generation
Chemical Engineering Journal ( IF 13.3 ) Pub Date : 2022-06-23 , DOI: 10.1016/j.cej.2022.137716
Susanta Bera , Hyun-Jae Woo , Hasmat Khan , Su-Young Park , Ji-Hu Baek , Woo-Jae Lee , Se-Hun Kwon

Non-precious metal (NPM) hydrogen catalyst are low-cost and highly efficient for the acidic hydrogen evolution reaction (HER). However, the overall activity of NPM catalyst at high current remains orders of magnitude lower than commercial platinum (Pt)-based catalyst. Herein, we report synthesis of NPM cobalt phosphide (CoP) catalyst-coated metallic electrode for HER with high current density of 100 mA/cm2 at − 151 mV versus a reversible hydrogen electrode which outperforms commercial Pt-C coated electrode. We introduce an interfacial C layer to improve acidic H2 evolution reaction activity-stability trend at high current density which results comparable HER stability with atomic layer deposited Pt electrode. Finally, the electrode has been utilized as a cathode in electrochemical neutralization cells for full water splitting, Zn-H2O battery and H2/H+ fuel-cell, wherein electrochemical neutralization energy (ENE) converts to electrical energy toward enhancing device performance and simultaneous H2 generation. This study presents a potential approach for non-platinum group HER catalysts in ENE-harvested systems.



中文翻译:

用于同时产生燃料和发电的电化学中和电池中的非贵重氢催化剂涂层金属电极

非贵金属 (NPM) 氢催化剂对酸性析氢反应 (HER) 成本低、效率高。然而,NPM 催化剂在大电流下的整体活性仍然比商业铂 (Pt) 基催化剂低几个数量级。在此,我们报告了用于 HER 的 NPM 磷化钴 (CoP) 催化剂涂层金属电极的合成,该电极在 - 151 mV 时具有 100 mA/cm 2的高电流密度,而可逆氢电极的性能优于商业 Pt-C 涂层电极。我们引入了界面 C 层以改善酸性 H 2在高电流密度下演化反应活性-稳定性趋势,导致与原子层沉积 Pt 电极相当的 HER 稳定性。最后,该电极已被用作电化学中和电池的阴极,用于全水分解、Zn-H 2 O 电池和 H 2 /H +燃料电池,其中电化学中和能量 (ENE) 转化为电能以提高设备性能和同时产生H 2。本研究提出了一种在 ENE 收集系统中使用非铂族 HER 催化剂的潜在方法。

更新日期:2022-06-24
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