Converting hierarchical biomass structure into cutting-edge architecture of electrocatalysts can effectively relieve the extreme dependency of nonrenewable fossil-fuel-resources typically suffering from low cost-effectiveness, scarce supplies, and adverse environmental impacts. A cost-effective cobalt-coordinated nanocellulose (CNF) strategy is reported for realizing a high-performance 2e-ORR electrocatalysts through molecular engineering of hybrid ZIFs-CNF architecture. By a coordination and pyrolysis process, it generates substantial oxygen-capturing active sites within the typically oxygen-insulating cellulose, promoting O₂ mass and electron transfer efficiency along the nanostructured Co₃O₄ anchored with CNF-based biochar. The Co-CNF electrocatalyst exhibits an exceptional H₂O₂ electrosynthesis efficiency of ≈510.58 mg L⁻¹ cm⁻² h⁻¹ with an exceptional superiority over the existing biochar-, or fossil-fuel-derived electrocatalysts. The combination of the electrocatalysts with stainless steel mesh serving as a dual cathode can strongly decompose regular organic pollutants (up to 99.43% removal efficiency by 30 min), showing to be a desirable approach for clean environmental remediation with sustainability, ecological safety, and high-performance.

中文翻译：

---

使用钴配位纳米纤维素电催化剂进行可扩展的阴极 H2O2 电合成


将分层生物质结构转化为尖端的电催化剂结构可以有效缓解对不可再生化石燃料资源的极端依赖，这些资源通常遭受低成本效益、供应稀缺和不利的环境影响。据报道，一种具有成本效益的钴配位纳米纤维素（CNF）策略通过混合 ZIF-CNF 结构的分子工程实现高性能 2e-ORR 电催化剂。通过配位和热解过程，它在典型的氧绝缘纤维素内产生大量的氧捕获活性位点，促进 O ₂ 沿纳米结构 Co ₃ O ₃ 的质量和电子转移效率b2> 锚定基于 CNF 的生物炭。 Co-CNF电催化剂表现出卓越的H ₂ O ₂ 电合成效率，约为510.58 mg L ⁻¹ cm ⁻² h ⁻¹ 与现有的生物炭或化石燃料衍生的电催化剂相比具有非凡的优越性。电催化剂与不锈钢网作为双阴极的组合可以强力分解常规有机污染物（30分钟去除效率高达99.43%），是一种具有可持续性、生态安全性和高去除率的清洁环境修复方法。 -表现。