Nitrate intercalation suppresses Fe active-site dissolution in NiFe-LDH for durable industrial alkaline oxygen evolution
Nitrate intercalation suppresses Fe active-site dissolution in NiFe-LDH for durable industrial alkaline oxygen evolution
研究概述
将弱碱性硝酸根插层进入NiFe-LDH，协同调节层间距、电子分布及Brønsted碱性，稳定高价Ni/Fe及活性羟基氧化物，抑制Fe溶解。80 ℃、30 wt% KOH中1 A/cm²运行超过500小时，衰减0.04 mV/h，寿命约为原NiFe-LDH的12倍。
谱图与表征信息
Figure 2 High-resolution XPS spectra of (a) Ni 2p, (b) Fe 2p, (c) O 1s, and (d) N 1s in NiFe-LDH and pristine NiFe-NO 3, respectively. (e) XANES spectra, (f) fitting of the EXAFS spectra of Ni foil, NiO, NiFe-LDH, and NiFe-NO 3 at the Ni K-edge.