Insight into electrochemical performance of porous FexSiy intermetallic anode for zinc electrowinning
Insight into electrochemical performance of porous FexSiy intermetallic anode for zinc electrowinning
复制标题
深入了解用于锌电积的多孔 FexSiy 金属间阳极的电化学性能
DOI：
10.1016/j.matdes.2020.108645
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发表时间：
2020-06
影响因子：
8.4
通讯作者：
Lin Nan
中科院分区：
文献类型：
--
作者：
Shen Botao;He Yuehui;Li Wenhao;Wang Zhonghe;Yu Linping;Jiang Yao;Liu Xinli;Kang Jiangang;Gao Haiyan;Lin Nan
铅基阳极在大规模工业生产中引起的铅污染已严重危害人类健康和破坏生态环境。本文首次采用元素粉末反应合成法制备了环境友好的多孔FexSiy金属间化合物作为锌电积阳极材料。研究了制备的多孔FexSiyan阳极（Fe 3Si、Fe 5Si 3和FeSi）的电化学性能。在160 g·L-1H 2SO 4中，多孔Fe 5Si 3阳极的综合性能相对较好。多孔Fe 5Si 3阳极在电积锌条件下具有电催化活性和长期稳定性，使用寿命可达400 h。OER活性表明，在50 mA·cm-2的电流密度下，多孔Fe 5Si 3阳极的过电位为1.072 V，塔菲尔斜率为326.6 mV·dec。电催化活性与开孔率呈正相关。阳极表面形成的氧化物主要由Fe 2 O3和无定形SiO2组成，它们对阳极起到了保护作用，并有助于提高OER活性。这表明Fe 5Si 3作为替代阳极材料具有潜在的工业应用价值。
Pb pollution, which is provoked by lead-based anodes in large-scale industrial production, has seriously endangered human health and destroyed the ecological environment in the past decades. In this work, environmentally friendly porous FexSiyintermetallics are prepared by elemental powder reactive synthesis as anodes in zinc electrowinning for the first time. The as-prepared porous FexSiyanodes (Fe3Si, Fe5Si3, and FeSi) have been investigated in terms of electrochemical performance. Among the three anodes, porous Fe5Si3anode shows relatively better comprehensive properties in 160 g·L−1H2SO4. Porous Fe5Si3anode exhibits electrocatalytic activity and long-term stability under the condition of zinc electrowinning, which guarantees a service life up to 400 h. The activity for OER shows that porous Fe5Si3anode is delivering an overpotential of 1.072 V and tafel slope of 326.6 mV·dec at current density of 50 mA·cm−2. The electrocatalytic activity is positively correlated with the open porosity. The oxides formed in the anode surface are mainly composed of Fe2O3and amorphous SiO2, which protect the anode against corrosion and help to the activity for OER. This result demonstrated that Fe5Si3as alternative anode material has potential application value in industry.
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DOI：
10.4028/www.scientific.net/amr.557-559.417
发表时间：
2012-07
期刊：
Advanced Materials Research
影响因子：
--
作者：
Hui Huang;J. Li;Z. Guo
通讯作者：
Hui Huang;J. Li;Z. Guo
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：
0.7
作者：
Z. Xiangyang;Ma Chiyuan;Yang Juan;W. Shuai;W. Hui;Long Bo
通讯作者：
Z. Xiangyang;Ma Chiyuan;Yang Juan;W. Shuai;W. Hui;Long Bo
影响因子：
6.6
作者：
Matsushima, H;Nishida, T;Kuribayashi, K
通讯作者：
Kuribayashi, K