Arnold J. Forman
University of California, Santa Barbara
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Publication
Featured researches published by Arnold J. Forman.
Journal of Materials Research | 2010
Zhebo Chen; Thomas F. Jaramillo; Todd Deutsch; Alan Kleiman-Shwarsctein; Arnold J. Forman; Nicolas Gaillard; Roxanne Garland; Kazuhiro Takanabe; C. Heske; Mahendra K. Sunkara; Eric W. McFarland; Kazunari Domen; Eric L. Miller; John A. Turner; Huyen N. Dinh
Photoelectrochemical (PEC) water splitting for hydrogen production is a promising technology that uses sunlight and water to produce renewable hydrogen with oxygen as a by-product. In the expanding field of PEC hydrogen production, the use of standardized
Nano Letters | 2011
In Sun Cho; Zhebo Chen; Arnold J. Forman; Dong Rip Kim; Pratap M. Rao; Thomas F. Jaramillo; Xiaolin Zheng
We report a hierarchically branched TiO(2) nanorod structure that serves as a model architecture for efficient photoelectrochemical devices as it simultaneously offers a large contact area with the electrolyte, excellent light-trapping characteristics, and a highly conductive pathway for charge carrier collection. Under Xenon lamp illumination (UV spectrum matched to AM 1.5G, 88 mW/cm(2) total power density), the branched TiO(2) nanorod array produces a photocurrent density of 0.83 mA/cm(2) at 0.8 V versus reversible hydrogen electrode (RHE). The incident photon-to-current conversion efficiency reaches 67% at 380 nm with an applied bias of 0.6 V versus RHE, nearly two times higher than the bare nanorods without branches. The branches improve efficiency by means of (i) improved charge separation and transport within the branches due to their small diameters, and (ii) a 4-fold increase in surface area which facilitates the hole transfer at the TiO(2)/electrolyte interface.
Nano Letters | 2011
In Sun Cho; Zhebo Chen; Arnold J. Forman; Dong Rip Kim; Pratap M. Rao; Thomas F. Jaramillo; Xiaolin Zheng
We report a hierarchically branched TiO(2) nanorod structure that serves as a model architecture for efficient photoelectrochemical devices as it simultaneously offers a large contact area with the electrolyte, excellent light-trapping characteristics, and a highly conductive pathway for charge carrier collection. Under Xenon lamp illumination (UV spectrum matched to AM 1.5G, 88 mW/cm(2) total power density), the branched TiO(2) nanorod array produces a photocurrent density of 0.83 mA/cm(2) at 0.8 V versus reversible hydrogen electrode (RHE). The incident photon-to-current conversion efficiency reaches 67% at 380 nm with an applied bias of 0.6 V versus RHE, nearly two times higher than the bare nanorods without branches. The branches improve efficiency by means of (i) improved charge separation and transport within the branches due to their small diameters, and (ii) a 4-fold increase in surface area which facilitates the hole transfer at the TiO(2)/electrolyte interface.
Energy and Environmental Science | 2013
Blaise A. Pinaud; Jesse D. Benck; Linsey C. Seitz; Arnold J. Forman; Zhebo Chen; Todd Deutsch; Brian D. James; Kevin N. Baum; George Newell Baum; Shane Ardo; Heli Wang; Eric L. Miller; Thomas F. Jaramillo
Photoelectrochemical water splitting is a promising route for the renewable production of hydrogen fuel. This work presents the results of a technical and economic feasibility analysis conducted for four hypothetical, centralized, large-scale hydrogen production plants based on this technology. The four reactor types considered were a single bed particle suspension system, a dual bed particle suspension system, a fixed panel array, and a tracking concentrator array. The current performance of semiconductor absorbers and electrocatalysts were considered to compute reasonable solar-to-hydrogen conversion efficiencies for each of the four systems. The U.S. Department of Energy H2A model was employed to calculate the levelized cost of hydrogen output at the plant gate at 300 psi for a 10 tonne per day production scale. All capital expenditures and operating costs for the reactors and auxiliaries (compressors, control systems, etc.) were considered. The final cost varied from
Angewandte Chemie | 2008
Chia-Kuang Tsung; Jie Fan; Nanfeng Zheng; Qihui Shi; Arnold J. Forman; Jianfang Wang; Galen D. Stucky
1.60–
Small | 2008
Jung-Nam Park; Arnold J. Forman; Wei Tang; Jihong Cheng; Yong-Sheng Hu; Hongfei Lin; Eric W. McFarland
10.40 per kg H2 with the particle bed systems having lower costs than the panel-based systems. However, safety concerns due to the cogeneration of O2 and H2 in a single bed system and long molecular transport lengths in the dual bed system lead to greater uncertainty in their operation. A sensitivity analysis revealed that improvement in the solar-to-hydrogen efficiency of the panel-based systems could substantially drive down their costs. A key finding is that the production costs are consistent with the Department of Energys targeted threshold cost of
Chemsuschem | 2014
Linsey C. Seitz; Zhebo Chen; Arnold J. Forman; Blaise A. Pinaud; Jesse D. Benck; Thomas F. Jaramillo
2.00–
Energy and Environmental Science | 2011
Peng Zhang; Alan Kleiman-Shwarsctein; Yong-Sheng Hu; Jarrod Lefton; Sudhanshu Sharma; Arnold J. Forman; Eric W. McFarland
4.00 per kg H2 for dispensed hydrogen, demonstrating that photoelectrochemical water splitting could be a viable route for hydrogen production in the future if material performance targets can be met.
Applied Physics Letters | 2006
J. M. Zide; Alan Kleiman-Shwarsctein; Nicholas C. Strandwitz; J. D. Zimmerman; T. Steenblock-Smith; A. C. Gossard; Arnold J. Forman; Anna Ivanovskaya; Galen D. Stucky
通讯作者地址: Wang, JF (通讯作者), Chinese Univ Hong Kong, Dept Phys, Shatin, Hong Kong Peoples R China 地址: 1. Chinese Univ Hong Kong, Dept Phys, Shatin, Hong Kong Peoples R China 2. Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106 USA 电子邮件地址: [email protected], [email protected]
Chemcatchem | 2010
Arnold J. Forman; Jung-Nam Park; Wei Tang; Yong-Sheng Hu; Galen D. Stucky; Eric W. McFarland
) that aresufficiently porous to allow unhindered mass transfer? 2) Howdoes the activity of the encapsulated catalysts compare totraditional supported Pd catalysts for CO oxidation andacetylene hydrogenation? 3) Do the shell structures providestability with respect to sintering at high temperatures?Nanoscale core/shell Pd@SiO