Immobilization of a phosphonated cobalt bis(terpyridine) catalyst on TiO₂ nanoparticles generates a photocatalyst that allows coupling aqueous CO₂-to-syngas (CO and H₂) reduction to selective oxidation of biomass-derived oxygenates or cellulose to formate. An enzymatic saccharification pre-treatment process is employed that enables the use of insoluble cellulose as an electron-donating substrate under benign aqueous conditions suitable for photocatalytic CO₂ conversion. The hybrid photocatalyst consists of solely earth-abundant components, and its heterogeneous nature allows for reuse and operation in aqueous solution for several days at 25 °C, reaching a cellulose-to-formate conversion yield of 17 %. Thus, the proof-of-concept for valorizing two waste streams (CO₂ and biomass) simultaneously into value-added chemicals through solar-driven catalysis is demonstrated.

中文翻译：

---

一种 TiO2-Co(三联吡啶)2 光催化剂，用于将纤维素选择性氧化为甲酸盐，并将 CO2 还原为合成气

将膦酸化钴双（三联吡啶）催化剂固定在 TiO ₂纳米颗粒上产生光催化剂，该光催化剂允许将含水 CO ₂到合成气（CO 和 H ₂）的还原与生物质衍生的含氧化合物或纤维素选择性氧化成甲酸盐。采用酶糖化预处理工艺，可在适合光催化 CO _{2 的}良性水性条件下使用不溶性纤维素作为给电子底物转换。混合光催化剂仅由地球上丰富的组分组成，其异质性允许在 25°C 的水溶液中重复使用和操作数天，纤维素到甲酸盐的转化率为 17%。因此，展示了通过太阳能驱动的催化将两种废物流（CO ₂和生物质）同时转化为增值化学品的概念验证。