Stabilizing a Platinum₁ Single‐Atom Catalyst on Supported Phosphomolybdic Acid without Compromising Hydrogenation Activity

Abstract

In coordination chemistry, catalytically active metal complexes in a zero- or low-valent state often adopt four-coordinate square-planar or tetrahedral geometry. By applying this principle, we have developed a stable Pt1 single-atom catalyst with a high Pt loading (close to 1 wt %) on phosphomolybdic acid(PMA)-modified active carbon. This was achieved by anchoring Pt on the four-fold hollow sites on PMA. Each Pt atom is stabilized by four oxygen atoms in a distorted square-planar geometry, with Pt slightly protruding from the oxygen planar surface. Pt is positively charged, absorbs hydrogen easily, and exhibits excellent performance in the hydrogenation of nitrobenzene and cyclohexanone. It is likely that the system described here can be extended to a number of stable SACs with superior catalytic activities.

General π‐Electron‐Assisted Strategy for Ir, Pt, Ru, Pd, Fe, Ni Single‐Atom Electrocatalysts with Bifunctional Active Sites for Highly Efficient Water Splitting

“…[1,2] Multifarious single atoms have been fabricated and demonstrated their ultimate size effects,s uch as Co 1 , [3] Pt 1 , [4] Ru 1 , [5] Ir 1 , [6] Fe 1 , [7] and Pd 1 . [1,2] Multifarious single atoms have been fabricated and demonstrated their ultimate size effects,s uch as Co 1 , [3] Pt 1 , [4] Ru 1 , [5] Ir 1 , [6] Fe 1 , [7] and Pd 1 .…”

Enhanced performance of Rh1/TiO2 catalyst without methanation in water‐gas shift reaction

“…Such low loading could result in unsatisfying overall conversion of target reactants in some cases because of the insufficient single‐atom active sites. In this regard, design of SAC with appreciable loading is urgently needed for the potential application …”

Reply to Comment on Stabilization of Low‐Valent Iron(I) in a High‐Valent Vanadium(V) Oxide Cluster

“…[1b] In summary,o ur interpretation of the EPR spectroscopy in terms of Fe-based reduction processes is consistent with Equations (1) and (2), but not with the vanadate-based processes of (4) and (5). Sproules proposes that the Fe ion remains as Fe III throughout and that the changes in the EPR spectra are due to interactions between Fe III and one vanadium(IV) ion after the one-electron reduction and between two vanadium(IV) ions after the second electron reduction step.B ased on our data analysis,o ur EPR spectral results show no evidence for such interactions,s ee also the EPR discussion in the original manuscript.…”