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Bimetal nickel–cobalt phosphide directly grown on commercial graphite substrate by the one-step electrodeposition as efficient electrocatalytic electrode
Progress in Natural Science: Materials International ( IF 4.7 ) Pub Date : 2020-08-01 , DOI: 10.1016/j.pnsc.2020.08.003
Alan Meng , Haiqin Zhang , Baihe Huangfu , Wenli Tian , Liying Sheng , Zhenjiang Li , Shuqin Tan , Qingdang Li

Abstract It is challenging to find a method to obtain a catalyst with low cost and efficient multifunctional performances. Herein, in order to obtain the electrode with high-performance water splitting and non-enzymatic glucose detection, the commercial graphite sheet (GS) with excellent durability and electroconductivity was used as substrate material, and the non-noble ternary component Ni–Co–P catalyst with hierarchical architecture was fabricated on GS via a co-electrodeposition. The catalyst only required low overpotentials of 44.6, 76.5 and 49 mV to drive the current density of 10 mA cm−2 alongside with the smaller Tafel slopes of 39.2, 44.8 and 112 mV dec−1 for hydrogen evolution reaction (HER) in 1.0 M KOH, 0.5 M H2SO4 and 1.0 M PBS solution, respectively. For oxygen evolution reaction (OER), the catalyst demonstrated a low overpotential of 304 mV to achieve the current density of 20 mA cm−2 with excellent Tafel slope of 89.8 mV dec−1 in alkaline solution. Furthermore, the Ni–Co–P/GS electrode serving as non-enzymatic glucose sensor exhibited the superior electrocatalytic activity with an ultrahigh sensitivity of 7400 μA mM−1 cm−2, low detection limit of 0.425 μM (S/N = 3), and wide linear range (1–1200 μM).

中文翻译:

双金属镍钴磷化物通过一步电沉积直接生长在商业石墨基板上作为高效电催化电极

摘要 寻找一种获得低成本、高效多功能催化剂的方法具有挑战性。在此,为了获得具有高性能水分解和非酶促葡萄糖检测的电极,使用具有优异耐久性和导电性的商业石墨片(GS)作为基材,非贵重的三元组分Ni-Co-通过共电沉积在 GS 上制备了具有分层结构的 P 催化剂。该催化剂只需要 44.6、76.5 和 49 mV 的低过电势即可驱动 10 mA cm-2 的电流密度以及 39.2、44.8 和 112 mV dec-1 的较小 Tafel 斜率,用于 1.0 M 中的析氢反应 (HER) KOH、0.5 M H2SO4 和 1.0 M PBS 溶液,分别。对于析氧反应 (OER),该催化剂表现出 304 mV 的低过电位,以实现 20 mA cm-2 的电流密度,在碱性溶液中具有 89.8 mV dec-1 的优异塔菲尔斜率。此外,作为非酶葡萄糖传感器的 Ni-Co-P/GS 电极表现出优异的电催化活性,超高灵敏度为 7400 μA mM-1 cm-2,低检测限为 0.425 μM (S/N = 3) , 和宽线性范围 (1–1200 μM)。
更新日期:2020-08-01
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