Rational Design of Pt−Pd−Ni Trimetallic Nanocatalysts for Room‐Temperature Benzaldehyde and Styrene Hydrogenation

Abstract

Nanostructures of the multimetallic catalysts offer great scope for fine tuning of heterogeneous catalysis, but clear understanding of the surface chemistry and structures is important to enhance their selectivity and efficiency. Focussing on a typical Pt−Pd−Ni trimetallic system, we comparatively examined the Ni/C, Pt/Ni/C, Pd/Ni/C and Pt−Pd/Ni/C catalysts synthesized by impregnation and galvanic replacement reaction. To clarify surface chemical/structural effect, the Pt−Pd/Ni/C catalyst was thermally treated at X=200, 400 or 600 °C in a H2 reducing atmosphere, respectively termed as Pt−Pd/Ni/C−X. The as‐prepared catalysts were characterized complementarily by XRD, XPS, TEM, HRTEM, HS‐LEIS and STEM‐EDS elemental mapping and line‐scanning. All the catalysts were comparatively evaluated for benzaldehyde and styrene hydrogenation. It is shown that the “PtPd alloy nanoclusters on Ni nanoparticles” (PtPd/Ni) and the synergistic effect of the trimetallic Pt−Pd−Ni, lead to much improved catalytic performance, compared with the mono‐ or bi‐ metallic counterparts. However, with the increase of the treatment temperature of the Pt−Pd/Ni/C, the catalytic performance was gradually degraded, which was likely due to that the favourable nanostructure of fine “PtPd/Ni” was gradually transformed to relatively large “PtPdNi alloy on Ni” (PtPdNi/Ni) particles, thus decreasing the number of noble metal (Pt and Pd) active sites on the surface of the catalyst. The optimum trimetallic structure is thus the as synthesised Pt−Pd/Ni/C. This work provides a novel strategy for the design and development of highly efficient and low‐cost multimetallic catalysts, e. g. for hydrogenation reactions.

From M6 to M12, M19 and M38 molecular alloy Pt–Ni carbonyl nanoclusters: selective growth of atomically precise heterometallic nanoclusters

“…[1][2][3][4][5][6][7] Different chemical and physical properties may arise, and these can find several applications particularly regarding catalysis, biology, biomedicine and sensors. [8][9][10][11][12][13][14][15][16][17][18] From the structural perspective, alloying may occur randomly or in an ordered way. [19][20][21][22][23][24][25][26] In the latter case, "ordered" may correspond to site-specific doping, formation of well defined ordered phases, segregation or related phenomena where the different metals occupy well defined positions.…”

Direct 3D Printing of Binder-Free Bimetallic Nanomaterials as Integrated Electrodes for Glycerol Oxidation with High Selectivity for Valuable C3 Products

“…At present, the use of LANP is restricted to generating single-component nanoparticles, such as Pt, Ru, and Ni, supported on few-layer graphene for hydrogen and oxygen evolution reactions (HER and OER) . Broadening the scope of catalytic metal choices for LANP is envisioned to extend the utility of LANP-made nanomaterials to address more challenging heterogeneous catalytic reactions, where multimetallic catalysts are particularly attractive for either minimizing the usage of costly noble-metal concentration and/or fine-tuning the local electronic environment at their active sites and hence enhancing the conversion efficiency and selectivity of a given product …”

“…69 Broadening the scope of catalytic metal choices for LANP is envisioned to extend the utility of LANP-made nanomaterials to address more challenging heterogeneous catalytic reactions, where multimetallic catalysts are particularly attractive for either minimizing the usage of costly noble-metal concentration and/or fine-tuning the local electronic environment at their active sites and hence enhancing the conversion efficiency and selectivity of a given product. 70 Herein, we develop an effective LANP method to generate dual-metal nanomaterials with tunable physical attributes and chemical compositions by adjusting laser parameters in an environmentally benign fashion without using UHV or discharging toxic liquid waste. LANP-made binary transitionmetal nanomaterials are then tested as GOR electrocatalysts with their performance at converting glycerol directly into useful compounds assessed at room temperature.…”

Isoprene selective hydrogenation using AgCu-promoted Pd nanoalloys

“…PtPdNi nanoalloy catalysts promoted the hydrogenation performance in styrene hydrogenation due to the synergistic effect between PtPd alloy and Ni particles. 39 The PdNiCo ternary nanoalloy catalysts 40 showed the best catalytic performance for tetrahydrofurfuryl alcohol in the selective hydrogenation of furfural (conversion of furfural – 100%, selectivity of tetrahydrofurfuryl alcohol – 97.1%). Based on those examples, it can be inferred that ternary nanoalloy catalysts may have outstanding advantages and great potential for the hydrogenation of diolefins.…”