Performance of metal alloys as hydrogen evolution reaction catalysts in a microbial electrolysis cell
Performance of metal alloys as hydrogen evolution reaction catalysts in a microbial electrolysis cell
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DOI：
10.1016/j.ijhydene.2011.06.013
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发表时间：
2011-08
影响因子：
7.2
通讯作者：
A. Jeremiasse;J. Bergsma;J. Kleijn;M. Saakes;C. Buisman;M. Stuart;H. Hamelers
中科院分区：
文献类型：
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作者：
A. Jeremiasse;J. Bergsma;J. Kleijn;M. Saakes;C. Buisman;M. Stuart;H. Hamelers
可以使用微生物电解池 (MEC) 从有机物中产生 H2。为了减少能量输入并提高 MEC 的氢气生产率，在阴极使用了催化剂。铂是一种有效的催化剂，但其高成本刺激人们寻找替代品，例如非贵金属合金。这项研究表明，在接近中性 pH 值的情况下测量，涂有镍-钼、镍-铁-钼或钴-钼合金的铜片比镍阴极对析氢反应具有更高的催化活性。然而，由于传质限制，催化活性在中性pH值附近无法充分发挥。催化活性在碱性 pH 值下得到最好的利用，此时传质不受限制。这在具有钴钼涂层阴极和阴离子交换膜的 MEC 中得到了证明，该膜在 2.5 kWh m−3H2 的电力输入下产生 50 m3H2m−3MEC d−1（在标准温度和压力下）。
H2can be produced from organic matter with a microbial electrolysis cell (MEC). To decrease the energy input and increase the H2production rate of an MEC, a catalyst is used at the cathode. Platinum is an effective catalyst, but its high costs stimulate searching for alternatives, such as non-noble metal alloys. This study demonstrates that copper sheet coated with nickel-molybdenum, nickel-iron-molybdenum or cobalt-molybdenum alloys have a higher catalytic activity for the hydrogen evolution reaction than nickel cathodes, measured near neutral pH. However, the catalytic activity cannot be fully exploited near neutral pH because of mass transport limitation. The catalytic activity is best exploited at alkaline pH where mass transport is not limiting. This was demonstrated in an MEC with a cobalt-molybdenum coated cathode and anion exchange membrane, which produced 50 m3H2m−3MEC d−1(at standard temperature and pressure) at an electricity input of 2.5 kWh m−3H2.