A carbon-reinforced nickel electrode for solar-driven, robust, and ampere-level seawater electrolysis
A carbon-reinforced nickel electrode for solar-driven, robust, and ampere-level seawater electrolysis
研究概述
通过3D打印构筑碳强化镍电极，形成排斥氯离子、易脱附气泡的表面，减少海水电解中的腐蚀及机械损伤。碱性海水析氧在1 A/cm²下稳定超过2100小时；与光伏及Pt修饰阴极耦合后，太阳能制氢效率22.76%，电流密度约1 A/cm²。
谱图与表征信息
Figure 3. Theoretical studies of C-Ni charge transfer and the repelling corrosive Cl−effect in simulated seawater (A and B) In situ Raman spectra of Ni-C ACE (A) and NF (B) at different applied potentials (ranging from 1.224 to 1.624 V). The yellow shaded area represents the characteristic Ni–O peak in NiOOH. (C) Ni k-edge XANES spectra. (D) Oxidation state analysis of Ni in Ni-C ACE_post (NiIII/NiIV). (E) Ion chromatography quantified Cl−adsorption in Ni-C ACE and NF. (F) Charge density difference distribution at the Ni-C ACE interface in the simulated working state (yellow and cyan represent charge accumulation and dissi pation, respectively). (G) Comparison of the adsorption energies of Ni-C ACE and NF for Cl−and OH−. (H) Gibbs free energy of the OER process between reaction intermediates and Ni under Ni3+ and Nihv in NF and Ni-C ACE, respectively.