Nickel-metal-orgsanic framework coupled with Cu sub-nanometer clusters enables reverse hydrogen spillover for efficient electrocatalytic nitrate reduction to ammonia
Nickel-metal-orgsanic framework coupled with Cu sub-nanometer clusters enables reverse hydrogen spillover for efficient electrocatalytic nitrate reduction to ammonia
研究概述
将Cu亚纳米团簇负载于Ni-MOF，构建硝酸盐还原制氨的串联位点：Cu促进硝酸根转亚硝酸根，Ni-MOF解离水生成活性氢，经Ni—O—Cu桥反向溢流至Cu位点促进后续氢化。峰值铵法拉第效率96.8%，生成速率0.44 mmol·h⁻¹·cm⁻²，亚硝酸盐积累较低。
谱图与表征信息
Fig. 2. (a) XRD patterns of Cu@Ni-MOF and Ni-MOF. (b) FTIR spectra of Cu@Ni-MOF and Ni-MOF. (c) Cu 2p XPS spectra of Cu@Ni-MOF. (d) O 1 s and (e) Ni 2p XPS spectra of Ni-MOF and Cu@Ni-MOF. (f) Charge density difference of Cu@Ni-MOF. (g) Ni K-edge XANES spectra; (h, i) Curve fitting results of Ni K-edge data in R- space and K-space for Ni-MOF, Cu@Ni-MOF, and Ni foil.