1. Volume 2, Issue 3, Pages 549-557 (March 2018)
Ultrasmall CoP Nanoparticles as Efficient Cocatalysts for Photocatalytic Formic Acid Dehydrogenation 
Shuang Cao, Yong Chen, Hui Wang, Jie Chen, Xinghua Shi, Hongmei Li, Ping Cheng, Xinfeng Liu, Min Liu, Lingyu Piao 
Joule 
Volume 2, Issue 3, Pages (March 2018)
DOI: /j.joule
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2. Joule 2018 2, DOI: ( /j.joule )
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3. Figure 1
Computational Investigation and Gas Adsorption-Desorption Test
(A) Calculated energy profile for hydrogen production on CoP (101) surface. The energy change for 2H+ + e− → H2 is defined as zero energy line. The relative energies are plotted with respect to the zero reference.
(B) The optimized structures of the initial states (IS), transition state (TS), and final state (FS), as labeled in (A).
(C and D) Gas adsorption-desorption test for (C) CoP and (D) Pt coated electrode at 1 V. The experiments were conducted in the indicated order.
Joule 2018 2, DOI: ( /j.joule )
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4. Figure 2 Synthesis Schematic and Material Characterization
(A) Schematic illustration of the hybrid synthesis.
(B) TEM and HRTEM (inset) images of the obtained NPs.
(C–I) TEM images of (C) (D) (F) and (H) HRTEM images of (E) (G) and (I) hybrids.
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5. Figure 3 Photocatalytic Measurements for FA Dehydrogenation
(A) Visible light-driven H2 production as a function of CoP contents in 4.0 M FA aqueous solution.
(B) H2 evolution in various solutions with different FA concentrations.
(C) Comparison of (8.3 wt%) with other similar systems for photocatalytic dehydrogenation of FA in aqueous solution (the detailed information is shown in Table S2).
(D) Photocatalytic comparison of CdS loaded with different cocatalysts under same experimental conditions with The weight ratios of Pt, Pd, Au, and Ru in the final hybrids are 8.3 wt%.
(E) Photocatalytic durability test for (8.3 wt%) in 6.6 M FA aqueous solution. CdS (1 mg) was added after 120 hr of irradiation.
All experiments are conducted in 20 mL of solution with 1 mg of hybrid catalyst, and the error bars are representative of three independent experiments.
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6. Figure 4
Metallic Property Exploration and Photogenerated Electron Transfer Investigation
(A and B) XPS spectra of (A) Co 2p3/2 and (B) P 2p for the hybrid.
(C) Current-voltage curve for CoP film.
(D and E) Steady-state PL (D) and TRPL (E) spectra for CdS, and The excitation wavelengths are 415 nm and 390 nm for PL and TRPL, respectively.
Joule 2018 2, DOI: ( /j.joule )
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7. Figure 5
Proposed Mechanism for Photocatalytic FA Dehydrogenation by Hybrid
The CoP NPs serve as the H2 production active sites, and the COOH− anion is oxidated by·OH radicals and the photogenerated holes on the VB band of CdS.
Joule 2018 2, DOI: ( /j.joule )
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