Rational control of catalytic selectivity still remains a grand challenge in the field of biomass conversion to value-added chemicals. In this paper, we used PtFe catalyst as an example to understand fundamentals for lattice strain, electronic reconfiguration, reaction kinetics and catalytic selectivity for aqueous conversion biopolyols. Structurally strained face centered tetragonal (fct) PtFe crystals were synthesized and it was confirmed that such unique PtFe nanostructures display intriguing electronic coupling effect and partial charge distribution, as revealed by surface characterization using TEM, XRD and XPS, as well as DFT calculation. Bimetallic PtFe-fct catalysts exhibit a remarkable catalytic activity (TOF: 24 312 h^–1 at 65 °C and 1 MPa O₂), enhanced selectivity (tartronic acid: 54%) and improved stability for aqueous phase oxidation of biopolyols, in comparison with conventional fcc morphology. Kinetic modeling further indicates that relatively lower oxidation barrier and restrained decarboxylation reaction are key for improving selectivity on PtFe-fct catalysts.

中文翻译：

---

结构应变的双金属PtFe纳米催化剂在生物多元醇到二元羧酸的水氧化中显示出可调节的催化选择性。

在将生物质转化为增值化学品领域，合理控制催化选择性仍然是一个巨大的挑战。在本文中，我们以PtFe催化剂为例，了解水转化生物多元醇的晶格应变，电子重构，反应动力学和催化选择性的基本原理。合成了结构应变的面心四方（fct）PtFe晶体，证实了这种独特的PtFe纳米结构显示出令人着迷的电子耦合效应和部分电荷分布，这通过使用TEM，XRD和XPS进行表面表征以及DFT计算得以揭示。双金属PTFE- FCT催化剂具有显着的催化活性（TOF：24 312ħ ^-1在65℃，1MPa的条件Ò₂），与传统的fcc形态相比，提高了选择性（酒石酸：54％）并提高了对生物多元醇水相氧化的稳定性。动力学模型进一步表明，相对较低的氧化势垒和受抑制的脱羧反应是提高PtFe- fct催化剂选择性的关键。