Facile and fast fabrication of iron-phosphate supported on nickel foam as a highly efficient and stable oxygen evolution catalyst
Facile and fast fabrication of iron-phosphate supported on nickel foam as a highly efficient and stable oxygen evolution catalyst
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简便快速地制备泡沫镍负载的磷酸铁作为高效稳定的析氧催化剂
DOI：
10.1039/c7ta05580c
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发表时间：
2017-09
影响因子：
11.9
通讯作者：
Li Jinping
中科院分区：
文献类型：
--
作者：
Zhong Dazhong;Liu Lin;Li D;an;Wei Congcong;Wang Qiang;Hao Genyan;Zhao Qiang;Li Jinping
电催化水分解是大规模制氢最有前途的途径之一。然而，它受到动力学缓慢的复杂析氧反应（OER）的阻碍。 NiFe基催化剂以其高活性、耐用性和低成本而闻名，一直是OER催化剂研究的“热点”。越来越多的报告表明铁位点提供了活性中心。同时，Fe被认为是最便宜且最丰富的过渡金属元素之一。在此，我们报告了一种简便快速的方法来制备支撑在泡沫镍支架（Fe-Pi/NF）上的铁-磷酸盐薄膜，表面具有暴露的铁位点。 Fe-Pi/NF 对 OER 表现出出色的活性，在 1 M KOH 溶液中需要 215 和 257 mV 的低过电势来分别驱动 10 和 100 mA cm−2 的电流密度。在过电势为 270 mV 时，TOF 高达 0.381 s−1。在电流密度约为 30 至 125 mA cm−2 之间，塔菲尔斜率低至 28 mV dec−1。它还在 90 小时稳定性测试中表现出出色的耐用性，计算出的法拉第效率接近 96%。为了进行比较，还制备了 Fe(OH)3/NF 电极。结果表明，Fe-Pi/NF 的 OER 活性优于 Fe(OH)3/NF。电负性磷酸基团的引入导致Fe-Pi/NF具有良好的亲水性，有效调整Fe3+的电子结构，促进Fe3+氧化为Fe4+。
Electrocatalytic water splitting is one of the most promising routes for large-scale hydrogen production. However, it is hindered by the complex oxygen evolution reaction (OER) with sluggish kinetics. NiFe-based catalysts, which are known for their high activity, durability, and low-cost, have been a “hot topic” in research on OER catalysts. Increasing numbers of reports have indicated that Fe sites provide active centers. Meanwhile, Fe is considered as the cheapest and one of the most abundant transition-metal elements. Herein, we report a facile and fast method to prepare iron–phosphate films supported on a nickel foam scaffold (Fe–Pi/NF), with exposed Fe sites at the surface. Fe–Pi/NF exhibited outstanding activity for the OER, requiring low overpotentials of 215 and 257 mV to drive current densities of 10 and 100 mA cm−2, respectively, in 1 M KOH solution. The TOF was as high as 0.381 s−1 at an overpotential of 270 mV. The Tafel slope was as low as 28 mV dec−1 between current densities of around 30 to 125 mA cm−2. It also exhibited excellent durability during a 90 h stability test, and the calculated faradaic efficiency was close to 96%. For comparison, Fe(OH)3/NF electrodes were also prepared. The results showed the OER activity of Fe–Pi/NF to be superior to those of Fe(OH)3/NF. The incorporation of electronegative phosphate groups results in the great hydrophilicity of Fe–Pi/NF and effectively adjusts the electronic structure of Fe3+ and facilitates the oxidation of Fe3+ to Fe4+.
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影响因子：
16.6
作者：
Lu, Xunyu;Zhao, Chuan
通讯作者：
Zhao, Chuan
影响因子：
16.6
作者：
Fan K;Chen H;Ji Y;Huang H;Claesson PM;Daniel Q;Philippe B;Rensmo H;Li F;Luo Y;Sun L
通讯作者：
Sun L
影响因子：
15
作者：
Jin, Kyoungsuk;Park, Jimin;Nam, Ki Tae
通讯作者：
Nam, Ki Tae
轻松制造支撑在泡沫镍上的坚固 3D Fe-NiSe 纳米线，作为高效、耐用的析氧催化剂
影响因子：
11.9
作者：
Zhao Qiang;Zhong Dazhong;Liu Lin;Li D;an;Hao Genyan;Li Jinping
通讯作者：
Li Jinping
影响因子：
8.6
作者：
Burke, Michaela S.;Enman, Lisa J.;Boettcher, Shannon W.
通讯作者：
Boettcher, Shannon W.