Utilizing artificial photosynthesis to activate the CO₂ reduction reaction and convert it into useful chemicals could drive carbon recycling toward neutrality, effectively addressing global environmental and energy challenges in the long run. Carbon nitride is commonly used as a photocatalytic material, and the introduction of metallic element in the modification process increases the cost of the catalyst. Herein, Cu atoms are uniformly anchored on the surface of sulfur-containing carbon nitride through a convenient phytate acid-bridged approach, resulting in the novel composite catalyst of copper phytate and sulfur-containing carbon nitride (CuPA/SCN). The catalytic performance of CuPA/SCN has been greatly improved, with a CH₃OH evolution rate of 11.87 μmol·g^–1·h^–1, which is nearly 10 times higher than that of SCN. Meanwhile, its excellent selectivity reaches up to 99.38%. Relevant tests and theoretical calculations reveal that CuPA can extract the electrons enriched at the S site and act as conductors. The surface electrons of carbon nitride are rearranged and enriched at S sites, transferred by Cu atoms, thereby promoting the continuous separation of photogenerated electrons and holes. The synergistic effect between CuPA and SCN prolongs charge recombination process, effectively improving the catalytic performance of the samples. This work enriches the complex catalysts of sulfur-containing carbon nitride for the catalytic conversion of carbon dioxide.

中文翻译：

---

含硫碳氮化物上的植酸桥铜增强光催化 CO2 还原为 CH3OH

利用人工光合作用激活CO ₂还原反应并将其转化为有用的化学品可以推动碳回收走向中性，从长远来看有效解决全球环境和能源挑战。氮化碳常用作光催化材料，改性过程中金属元素的引入增加了催化剂的成本。在此，通过方便的植酸酸桥接方法将铜原子均匀地锚定在含硫碳氮化物的表面上，从而产生了新型植酸铜和含硫碳氮化物（CuPA/SCN）的复合催化剂。 CuPA/SCN的催化性能得到了大幅提升，CH ₃ OH析出速率为11.87 μmol·g ^–1 ·h ^–1，比SCN提高了近10倍。同时，其优异的选择性高达99.38%。相关测试和理论计算表明，CuPA可以提取S位富集的电子并起到导体的作用。氮化碳表面电子在S位点重排和富集，通过Cu原子转移，从而促进光生电子和空穴的连续分离。 CuPA和SCN之间的协同作用延长了电荷复合过程，有效提高了样品的催化性能。该工作丰富了含硫氮化碳复合催化剂用于二氧化碳催化转化的研究。