A Novel Carbon Support: Few‐Layered Graphdiyne‐Decorated Carbon Nanotubes Capture Metal Clusters as Effective Metal‐Supported Catalysts

Abstract

Carbon‐supported metal nanocatalysts have received substantial attention for heterogeneous catalysis in industry. Hunting for suitable and impactful carbon supports that have strong interactions with metal nanocatalyst is a matter of great urgency. Herein, a well‐designed graphdiyne layer decorated on the carbon nanotubes sidewalls (CNT@GDY) serves as a novel carbon support. This unique hybrid structure effectively traps platinum and palladium atomic clusters (Pt/Pd‐ACs) with dimensions of 0.65 nm and 1.05 nm uniformly and firmly, forming novel carbon‐supported metal nanocatalysts (Pt(Pd)‐ACs/CNT @ GDY) for efficient hydrogen generation and aromatic nitroreduction, respectively. The Pt‐ACs/CNT@GDY can deliver an HER current density of 10 mA cm−2 with a small overpotential of 23 mV in 0.5 M H2SO4, showing a greatly enhanced mass activity, intrinsic activity than the commercial Pt/C catalyst. The Pd‐ACs/CNT@GDY also exhibits excellent catalytic activity and a high turnover frequency of 38.0 min−1 for aromatic nitroreduction. The carbon support turns out to possess excellent conductivity, abundant and uniform reactive sites, low redox potential, more negative surface and large specific surface area as well as a strong interaction with ACs, as anticipated in ideal supports, which can be applied in other metal‐supported catalysts.

Ultrathin Graphdiyne/Graphene Heterostructure as a Robust Electrochemical Sensing Platform

“…Nevertheless, owing to the low conductivity of bulk GDY, the peak current significantly drops after modification with GDY (i.e., GDY/GCE). When compared to GDY/GCE, the peak current for GDY/G/GCE shows a significant improvement, proving that graphene can facilitate efficient electron transfer on the electrode surface and increase electrochemical activity. − …”

“…21,43 (2) The unique pore structure of GDY allows heavy metal ions to be embedded, providing an ideal adsorption location. 26,31 As shown in Figure 3f, GDY/G/GCE also implements simultaneous detection of Pb 2+ and Cd 2+ . In the concentration range of 0.005−1.5 μM, the current response of GDY/G/GCE increases with the increase of Pb 2+ and Cd 2+ concentrations.…”

Graphdiyne: A Versatile Material in Electrochemical Energy Conversion and Storage

“…Nowadays, the application of GDY-based materials in various electrochemical reactions, such as hydrogen evolution reaction(HER), oxygen evolution reaction(OER), ORR and over water splitting(OWS) have been widely investigated [68] . In those reactions, GDY can not only act as a support for the catalysts but also as metal-free catalysts by appropriate modifications [69,70] .…”

Role of Post-Hydrothermal Treatment on the Microstructures and Photocatalytic Activity of TiO2-Based Nanotubes

“…Therefore, because of their increased surface area and one-dimensional shape, TiO 2 are expected to be a feasible strategy, which offers an effective delocalization method for the charge carriers. Owing to many peculiar characteristics, such high charge-discharge capacity, excellent photocatalytic ability and high surface area, these one-dimensional nanostructures have been employed in electrochemical energy storage systems [17,18] in addition to in photovoltaics and semiconductor photocatalysts as well as catalysts support and gas sensors [19][20][21]. To produce one-dimensional nanostructures of TiO 2 (initially called needle-like structures), Kasuga et al revealed an alkali hydrothermal process [22].…”