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"Fuller, Jack"
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Ambient methane functionalization initiated by electrochemical oxidation of a vanadium (V)-oxo dimer
The abundant yet widely distributed methane resources require efficient conversion of methane into liquid chemicals, whereas an ambient selective process with minimal infrastructure support remains to be demonstrated. Here we report selective electrochemical oxidation of CH
4
to methyl bisulfate (CH
3
OSO
3
H) at ambient pressure and room temperature with a molecular catalyst of vanadium (V)-oxo dimer. This water-tolerant, earth-abundant catalyst possesses a low activation energy (10.8 kcal mol
‒1
) and a high turnover frequency (483 and 1336 hr
−1
at 1-bar and 3-bar pure CH
4
, respectively). The catalytic system electrochemically converts natural gas mixture into liquid products under ambient conditions over 240 h with a Faradaic efficiency of 90% and turnover numbers exceeding 100,000. This tentatively proposed mechanism is applicable to other d
0
early transition metal species and represents a new scalable approach that helps mitigate the flaring or direct emission of natural gas at remote locations.
The undesirable geological release of methane at remote locations can be lessened through an efficient methane conversion process. Here, the authors report selective ambient functionalization of methane by a vanadium (V)-oxo electrocatalyst with a low activation energy and a high turnover frequency.
Journal Article
One from without
\"A major corporate hostile takeover is complicated by the Board's handling of a mysterious hacker who is somehow selectively sabotaging the core data storage integrity of key corporate personnel while, at the same time, the CFO finds himself having to face the personal consequences of his earlier life in the CIA. \"-- Provided by publisher.
BOOK
Understanding the role of negative charge in the scaffold of an artificial enzyme for CO2 hydrogenation on catalysis
We have approached the construction of an artificial enzyme by employing a robust protein scaffold, lactococcal multidrug resistance regulator, LmrR, providing a structured secondary and outer coordination spheres around a molecular rhodium complex, [Rh
I
(P
Et2
N
gly
P
Et2
)
2
]
−
. Previously, we demonstrated a 2–3 fold increase in activity for one Rh-LmrR construct by introducing positive charge in the secondary coordination sphere. In this study, a series of variants was made through site-directed mutagenesis where the negative charge is located in the secondary sphere or outer coordination sphere, with additional variants made with increasingly negative charge in the outer coordination sphere while keeping a positive charge in the secondary sphere. Placing a negative charge in the secondary or outer coordination sphere demonstrates decreased activity by a factor of two compared to the wild-type Rh-LmrR. Interestingly, addition of positive charge in the secondary sphere, with the negatively charged outer coordination sphere restores activity. Vibrational and NMR spectroscopy suggest minimal changes to the electronic density at the rhodium center, regardless of inclusion of a negative or positive charge in the secondary sphere, suggesting another mechanism is impacting catalytic activity, explored in the discussion.
Graphical abstract
Journal Article
What is happening to news?
Nonetheless, many important messages cannot be communicated in thirty words or a six-second sound bite - let alone in the 140 characters of a Twitter post (\"tweet\"). * Technological change continues to bring down the wall between the written, the visual, and the audible ; effective communications increasingly will require the use of all three, seamlessly integrated. * Attention spans will not spontaneously lengthen. [...] there appear to be severe limits on how much information a person can process in a given period of time, limits that are only susceptible to slight expansion through practice. [...] it should be part of the intellectual arsenal that creative journalists committed to serving the public interest use to create the bold new ways of telling stories that will get the job done in our distracted, message-immersed world.
Journal Article
Realizing Performance and Emissions Goals in the Fluidized Bed Combustion Industry
A major focus in the energy industry today is the reduction of harmful emissions, especially greenhouse gases. Fossil fuel technologies offer the most reliable and effective solution to modern energy demands, but also are considered the primary culprit behind harmful emissions. Meeting ever tighter restrictions set forth by regulatory organizations such as the U.S. Environmental Protection Agency requires continuous efforts to improve technology toward increased performance and reduced emissions. The coal power plant industry is no exception. High performance Fluidized Bed Combustion (FBC) boiler technology allows the coal industry to remain competitive in today's difficult energy climate. The continuous improvement efforts for FBC plants have come in the form of an extensive and ongoing benchmark study spanning the last decade. This research paper presents the survey results and analysis of the 2010 benchmark study and compares the data to past years. This allows the industry an important reference tool to compare performance within the industry and identifies trends to assist industry members in improvement efforts.
Journal Article
When SMART Goals Are Not So Smart
We rarely question the need for goals, and the familiar acronym SMART instructs us that good goals should be specific, measurable, achievable, realistic, and time-based. But none of these attributes say anything about the context in which we are setting goals. In stable, predictable environments, it makes sense to set goals that are specific and measurable. For instance, some markets, such as confectionary and cosmetics, grow with gross domestic product and follow relatively predictable trends. Thus, a company like Mars Inc can plan out a multiyear strategy in its core categories. In more dynamic and uncertain environments, however, SMART goals can be problematic. It's hard to manage to specific, time-based targets when demand, technology, business models, and competitor sets are incessantly shifting, as is common in emerging or recently disrupted industries, like genetic testing services or augmented reality technology. SMART goals, by specifying details such as the destination and arrival time, help us identify the right actions in the right order.
Journal Article
Modes of Electricity Generation, Delivery Systems, and the Role of Trust in Creating Solar Photovoltaic (PV) Markets
Fossil fuel-burning power plants have been a central feature of electricity delivery systems since their inception. This highly centralized and top-down method of producing electric power for consumption is extremely effective. However, recent political and social trends have called for the increased use of alternative and renewable energy sources to mitigate the harmful effects that burning fossil fuels has on the environment. Energy portfolio standards (EPS) policies have mandated that utilities produce a percentage of their electricity using clean technologies. These mandates will have a profound effect on traditional power delivery systems. Some technologies have been adopted rather easily while solar photovoltaic (PV) installations continue to remain largely underutilized. This paper will make the case that solar PV installations simply do not fit into the traditional power delivery system. They require that consumers also become producers in the electricity market, creating a decentralized power network which completely changes the traditional relationship between customers and utilities. When consumers become part producers, they begin to think like the management team of a business. They must be certain that their investments will have positive returns. The current regulatory and legal structure does not address the needs of the consumer-producer hybrid. This will have to change in order to create trust in the solar PV market and attract potential investors.
Journal Article