Spatially Confined Co-N4 Sites on N-Doped Carbon Nanotube for Efficient Salt-Free Neutral H2O2 Electrosynthesis
Spatially Confined Co-N4 Sites on N-Doped Carbon Nanotube for Efficient Salt-Free Neutral H2O2 Electrosynthesis
研究概述
将结构明确的六足三联吡啶Co前驱体锚定于氧化碳纳米管，热解形成空间限域Co—N4单原子位点，促进*OOH路径两电子氧还原。中性电解液中宽电位范围H2O2选择性接近100%；膜电极在300 mA/cm²下产率70.3 mol·h⁻¹·g催化剂⁻¹，获得9.4 mM无盐H2O2。
谱图与表征信息
Figure 2. Structure characterization of the CoN@OCNT catalysts. (a) HAADF-STEM image of the CoN@OCNT. (b) Co K-edge XANES spectra of the CoN@OCNT and reference samples. (c) Linear fit of Co valence versus Co K-edge energy position. (d) FT k2-weighted and fitting extended XAFS (EXAFS) spectra of the CoN@OCNT and reference samples. (e) Wavelet transform (WT) k2-weighted EXAFS contour plots of the CoN@OCNT and reference samples.